
/*
 * Copyright 2011 Google Inc.
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */
#include "SampleCode.h"
#include "SkView.h"
#include "SkCanvas.h"
#include "SkCamera.h"
#include "SkEmbossMaskFilter.h"
#include "SkGradientShader.h"
#include "SkPath.h"
#include "SkRegion.h"
#include "SkShader.h"
#include "SkUtils.h"
#include "SkRandom.h"
#include "SkImageDecoder.h"

class CameraView : public SampleView
    {
        SkTDArray<SkShader*> fShaders;
        int     fShaderIndex;
        bool    fFrontFace;
    public:
        CameraView()
            {
            fRX = fRY = fRZ = 0;
            fShaderIndex = 0;
            fFrontFace = false;

            for (int i = 0;; i++)
                {
                SkString str;
                str.printf("/skimages/elephant%d.jpeg", i);
                SkBitmap bm;
                if (SkImageDecoder::DecodeFile(str.c_str(), &bm))
                    {
                    SkShader* s = SkShader::CreateBitmapShader(bm,
                                  SkShader::kClamp_TileMode,
                                  SkShader::kClamp_TileMode);

                    SkRect src = { 0, 0, SkIntToScalar(bm.width()), SkIntToScalar(bm.height()) };
                    SkRect dst = { -150, -150, 150, 150 };
                    SkMatrix matrix;
                    matrix.setRectToRect(src, dst, SkMatrix::kFill_ScaleToFit);
                    s->setLocalMatrix(matrix);
                    *fShaders.append() = s;
                    }
                else
                    {
                    break;
                    }
                }
            this->setBGColor(0xFFDDDDDD);
            }

        virtual ~CameraView()
            {
            fShaders.unrefAll();
            }

    protected:
        // overrides from SkEventSink
        virtual bool onQuery(SkEvent* evt)
            {
            if (SampleCode::TitleQ(*evt))
                {
                SampleCode::TitleR(evt, "Camera");
                return true;
                }
            return this->INHERITED::onQuery(evt);
            }

        virtual void onDrawContent(SkCanvas* canvas)
            {
            canvas->translate(this->width()/2, this->height()/2);

            Sk3DView    view;
            view.rotateX(fRX);
            view.rotateY(fRY);
            view.applyToCanvas(canvas);

            SkPaint paint;
            if (fShaders.count() > 0)
                {
                bool frontFace = view.dotWithNormal(0, 0, SK_Scalar1) < 0;
                if (frontFace != fFrontFace)
                    {
                    fFrontFace = frontFace;
                    fShaderIndex = (fShaderIndex + 1) % fShaders.count();
                    }

                paint.setAntiAlias(true);
                paint.setShader(fShaders[fShaderIndex]);
                SkRect r = { -150, -150, 150, 150 };
                canvas->drawRoundRect(r, 30, 30, paint);
                }

            fRY += SampleCode::GetAnimSecondsDelta() * 90;
            if (fRY >= SkIntToScalar(360))
                {
                fRY = 0;
                }
            this->inval(NULL);
            }

    private:
        SkScalar fRX, fRY, fRZ;
        typedef SampleView INHERITED;
    };

//////////////////////////////////////////////////////////////////////////////

static SkView* MyFactory()
    {
    return new CameraView;
    }
static SkViewRegister reg(MyFactory);

